package com.dao;

import java.util.Date;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.LockMode;
import org.hibernate.Query;
import org.hibernate.criterion.Example;

import com.pojos.Students;

/**
 * Data access object (DAO) for domain model class Students.
 * 
 * @see com.pojos.Students
 * @author MyEclipse Persistence Tools
 */

public class StudentsDAO extends BaseHibernateDAO {
	private static final Log log = LogFactory.getLog(StudentsDAO.class);

	// property constants
	public static final String XNAME = "xname";

	public static final String XSEX = "xsex";

	public static final String XZHUAN = "xzhuan";

	public static final String XBEI = "xbei";

	public void save(Students transientInstance) {
		log.debug("saving Students instance");
		try {
			getSession().save(transientInstance);
			log.debug("save successful");
		} catch (RuntimeException re) {
			log.error("save failed", re);
			throw re;
		}
	}

	public void delete(Students persistentInstance) {
		log.debug("deleting Students instance");
		try {
			getSession().delete(persistentInstance);
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}

	public Students findById(java.lang.Integer id) {
		log.debug("getting Students instance with id: " + id);
		try {
			Students instance = (Students) getSession().get(
					"com.hibernate.Students", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(Students instance) {
		log.debug("finding Students instance by example");
		try {
			List results = getSession()
					.createCriteria("com.hibernate.Students").add(
							Example.create(instance)).list();
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		} catch (RuntimeException re) {
			log.error("find by example failed", re);
			throw re;
		}
	}

	public List findByProperty(String propertyName, Object value) {
		log.debug("finding Students instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from Students as model where model."
					+ propertyName + "= ?";
			Query queryObject = getSession().createQuery(queryString);
			queryObject.setParameter(0, value);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}

	public List findByXname(Object xname) {
		return findByProperty(XNAME, xname);
	}

	public List findByXsex(Object xsex) {
		return findByProperty(XSEX, xsex);
	}

	public List findByXzhuan(Object xzhuan) {
		return findByProperty(XZHUAN, xzhuan);
	}

	public List findByXbei(Object xbei) {
		return findByProperty(XBEI, xbei);
	}

	public List findAll() {
		log.debug("finding all Students instances");
		try {
			String queryString = "from Students";
			Query queryObject = getSession().createQuery(queryString);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}

	public Students merge(Students detachedInstance) {
		log.debug("merging Students instance");
		try {
			Students result = (Students) getSession().merge(detachedInstance);
			log.debug("merge successful");
			return result;
		} catch (RuntimeException re) {
			log.error("merge failed", re);
			throw re;
		}
	}

	public void attachDirty(Students instance) {
		log.debug("attaching dirty Students instance");
		try {
			getSession().saveOrUpdate(instance);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(Students instance) {
		log.debug("attaching clean Students instance");
		try {
			getSession().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}
}